Put a pullup bar someplace where you will pass all the time. Then it is easy to try one as you pass by. It has been years since I had such a place and thus that I could once do them is a memory.

My tips for doing pull-ups:

Do them a lot, in any way you can.

Resistance bands are great for putting a foot or knee into, relieving you of some of your body weight, so that you can actually put your muscles through a full range of motion at an easier level.

Pull-up machines do basically the same thing, though they aren’t as common.

Gymnastics rings can give you a lower position from which to pull, so you can rest your heels on the floor with your body in an L shape, again reducing the weight you have to lift.

Negative pull-ups, where you start with your chin at bar level (normally by jumping) and then slowly lower yourself to full extension, will also build your pull-up muscles.

A chair that you can put a foot on will help, too. Or a friend who can hold your foot/feet (and who knows when to let go, lol).

And finally, losing weight in other ways (cardio is a good one, so is calorie counting) helps a lot, for obvious reasons.

Hope this helps and happy pulling!